The Late Night Pick-Up Line

Ask a straight man, "How do you like your women?" and it’s unlikely he’ll answer, "Dumb and sleepy." But according to new findings, these characteristics—and any other traits suggesting that the lady isn’t particularly alert—are precisely what the human male has evolved to look for in a one-night-stand.

In an article soon to be published in Evolution and Human Behavior, University of Texas–Austin graduate student Cari Goetz and her colleagues explored what they called the sexual exploitability hypothesis. … Goetz and her team began with the assumption that—because our brains evolved long before prophylactics entered the picture—female cognition is still sensitive to the pregnancy-related consequences of uncommitted sex and women remain more reluctant than men to engage in it. They set out to test the idea that any indication that a woman’s guard is lowered—that she’s "sexually exploitable"—is a turn-on for your average man.